Feliks Aleksanders Zemdegs (, ; born 20 December 1995) is an Australian Rubik's Cube speedsolver. He is the only speedcuber ever to win the World Cube Association World Championship twice, winning in 2013 and 2015, and is widely considered the most successful and greatest speedcuber of all time. He has set more than 350 records across various speedcubing events: 121 world records, 211 continental records, and 6 national records. Biography Feliks Zemdegs is of Latvian descent and his maternal grandmother is Lithuanian. Zemdegs bought his first speedcube in April 2008 after being inspired by speedcubing videos and tutorials on YouTube. The first unofficial time he recorded was an average of 19.73 seconds on 14 June 2008. He has been using CFOP to solve the 3×3×3 since he was 12 years old, the Yau method to solve the 4×4×4 and 5x5x5, the CLL method to solve the 2×2×2, and the Reduction method for 6x6x6 and 7×7×7. Zemdegs won the 3×3×3 event at the first competition he attended, the New Zealand Championships 2009 on 18 July 2009, with an average of 13.74 seconds in the final round. He also won 2×2×2, 4×4×4, 5×5×5, 3×3×3 blindfolded, and 3×3×3 one-handed. At his next competition, the Melbourne Summer Open 2010 on 30 January 2010, Zemdegs set his first world records for 3×3×3 average and 4×4×4 average, with times of 9.21 seconds and 42.01 seconds, respectively. He held the 3×3×3 average world record continuously from then until 23 April 2017, improving it 8 times, eventually to 6.45 seconds. The most world records he has ever held at one time is 12, in May 2011. As recently as 28 January 2017, he held 11 of those records concurrently. At the World Championship 2011 in Bangkok, Zemdegs won 2×2×2, 4×4×4, 5×5×5, and 6×6×6. He also took third in 3×3×3 after winning the first three rounds, and placed third in 7×7×7. At the World Championship 2013 in Las Vegas, Zemdegs won 3×3×3, 4×4×4, and 3×3×3 One-handed. He also placed second in 5×5×5 and third in 7×7×7. At the World Championship 2015 in São Paulo, Zemdegs won 3×3×3, 2×2×2, 4×4×4, and 5×5×5. He also placed second in 6×6×6, 7×7×7, and Megaminx. At the World Championship 2017 in Paris, Zemdegs won 5×5×5 and 7×7×7. He also took second in 6×6×6, 3×3×3 One-handed, and Megaminx, and placed third in 4×4×4. At the World Championship 2019 in Melbourne, Zemdegs only podiumed in one